One output channel (the right) on this older but still excellent amp won't play during the first perhaps 30 minutes of warmup and use; then it plays intermittently; and eventually it seems to play steadily--but must be considered unreliable. It there an easy fix, something easy to replace, or it this a "cost more to check out than it's worth" situation? Shame to toss this fine old box, but must be practical.What do you think? (I isolated the problem to the amplifier via changing inputs, outputs, earphones, speakers, etc., and using all face controls.)
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